Surprisingly, enzymes responsible for the biosynthesis of well-known cancer-associated structures, such as β1,6 branching (MGAT5), sialyl-Tn (ST6GALNAC1) sLex (FUT6), Sia6LacNAc (ST6GAL1), and core-fucosylation (FUT8) lack any relationship with survival. This evidence concerns the gene MGAT5 and cancer.